By moving a control member 3 in a predetermined direction from a wait position, a lancing device A can perform a lancet retreat operation for retreating a lancet holder 2 to locate a lancet 9 at a predetermined retreated position and a lancet detachment operation for pushing out the lancet 9 forward of the lancet holder 2 after a lancing operation. The control member 3 returns to the wait position by action of a return member 7 both after the lancet retreat operation and after the lancet detachment operation. Thus, the lancing device A is convenient.
